A dishonest milkman professes to sell milk at cost price but he mixes water into the milk and therefore he gains by 16\(\frac{2}{3}\)%. Find ratio of mixture to water.

7 : 1 7 : 6 9 : 7 1 : 1

7 : 1

Gain is because of added water CP  =  Milk Price SP – CP  =  Water added (Profit) 16\(\frac{2}{3}\)%  =  \(\frac{1}{6}\)        Milk  :  Water   :     Mixture   6    :     1      :          7 Mixture  :  Water =  7  :   1